Effluent Gas Scrubber with ORP and pH Control
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Solution Overview
Problem
Existing scrubbers are ineffective in removing non-water soluble gases such as silane from effluent gas mixtures, and methods using oxidizing agents like sodium hypochlorite pose safety risks due to intense reactions.
Innovation Solution
An effluent gas scrubber system with an oxidation-reduction potential (ORP) probe and pH probe that controls the addition of oxidizers and bases to the scrubbing fluid, maintaining optimal pH levels to safely and effectively oxidize non-water soluble gases, including silane, using chambers with nozzles to spray the fluid and prevent clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wet fume scrubbers are used to remove gases from effluent, then water soluble gases are readily removed, but non-water soluble gases such as silane cannot be removed
Solution Approach 1:
The invention changes the chemical parameter of the scrubbing fluid by adding oxidizing agents (such as sodium hypochlorite, hydrogen peroxide, or ozone) to create a reactive environment that can oxidize non-water soluble gases like silane, making them removable through the scrubbing process
Solution Approach 2:
The oxidizing agent acts as an intermediary substance that facilitates the removal of non-water soluble gases by first oxidizing them into water-soluble forms that can then be absorbed by the scrubbing fluid
2Productivity
If strong oxidizing agents like sodium hypochlorite are added to the scrubbing fluid, then non-water soluble gases can be oxidized and removed, but intense reactions occur creating safety risks
Solution Approach 1:
The invention employs an oxidation-reduction potential (ORP) probe to continuously monitor the oxidizing capacity of the scrubbing fluid and provides feedback to the control system, which automatically adjusts the dosage of oxidizing agent to maintain optimal levels without excessive reaction intensity
Solution Approach 2:
The system dynamically adjusts the oxidizing agent concentration based on real-time ORP measurements and gas flow conditions, transitioning from static dosing to adaptive control that matches the actual oxidation needs while minimizing harmful reactions
3Productivity
If oxidizing agents are continuously added to maintain oxidation capability, then non-water soluble gases can be effectively removed, but the system complexity and operational monitoring requirements increase
Solution Approach 1:
The ORP probe enables the scrubbing system to self-regulate oxidizing agent dosing by automatically detecting when oxidation capacity is depleted and triggering replenishment, reducing the need for manual monitoring and intervention while maintaining consistent performance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system efficiently removes non-water soluble gases by maintaining optimal oxidation-reduction potential and pH levels, reducing the risk of violent reactions and ensuring safe operation while preventing clogging and condensation in the scrubber.
Implementation Method 1
The oxidizer is effective to oxidize non-water soluble gases from the effluent gas that would not otherwise be removed by the scrubbing fluid
Implementation Method 2
Some gases, of which a few examples are chlorine, fluorine and ammonia, are water soluble and are readily removed by this method
Data Source
AI summary
An effluent gas scrubber and a method of scrubbing effluent gases are provided. An inlet port receives an effluent gas. The gas passes through successive chambers in which it is sprayed with a scrubbing fluid. An oxidizer within the scrubbing fluid is effective to oxidize non-water soluble gases within the effluent gas. An oxidation-reduction potential probe measures the oxidation-reduction potential of the scrubbing fluid and adds the oxidizer to the scrubbing fluid as needed. A pH probe measures the pH of the scrubbing fluid and adds a base to the scrubbing fluid as needed to maintain the pH at or above a threshold such as pH 7, or pH 12.